Process for making autotype printing-blocks.



E. ALBERT.

APPARATUS FOR MAKING AUTOTYPE PRINTING BLOCKS,

APPLICATION FILED JULY 23. 1908.

Patented June 29, 1909.

4 SHEETSSHEE Fig. 2.

Invenzow flfzorney E. ALBERT.

APPARATUS FOR MAKING AUTOTYPE PRINTING BLOCKS.

APPLICATION FILED JULY 23, 1908.

Patented June 29, 1909.

4 SHEETS-SHEET 2.

Winesses E. ALBERT.

APPARATUS FOR MAKING AUTOTZPE PRINTING BLOCKS.

APPLICATION FILED JULY 23, 1908.

Patented June 29, 190%.

4 SHEETS-SHEET 3.

E ALBERT.

APPARATUS r011 MAKING AUTOTYPE PRINTING BLOGKS.

APPLICATION FILED JULY 23, 190B. Qfifigfi, Patented June 29, 1909.

of the path.

EUGEN ALBERT, OF MUNICH, GERMANY.

No. ssssve.

Specification of Letters ?atent.

Patented June 29,

Application filed July 23, 1908. Serial 1E0. assess.

To all whom it may concern:

Be it known that I, EUGEN ALBERT, a subject of the Emperor of Germany, residing at Munich, in the Kingdom of Bavaria, Ger- 5 many, have invented certain new and use ful Improvements'in Apparatus for Making Autotype Printing-Blocks, of which the following 1s a specification.

This invention relates to improvements in 0 apparatus for carrying into i'actical eli'ect my improved process for maliing' auto-type printing blocks by means of cross screens, for which an a )plication for a United States patent was filed July 23, 1908 under Ser. No.

The process consists in efiecting the proj ection of the transparent spaces of the cross screen upon the sensitive layer oi the block by continuously altering the relative posi- 0 tions of the screen and the sensitive plate with reference to the source of light so that the central points of the projections of the t ans arent spaces of the screen form a closed annu ar shaped ath.

The object oi the invention is to provide apparatus for supporting the copying frame and screen so that they can be moved in an annular, or elliptical path, and also to provide means for adjusting the size or diameter I attain these objects by the mechanism illustrated in the accompanying drawing, in which:

Figure 1 is a diagrammatic view showing the projection of a single transparent aperture of the screen much enlarged and the ath it is required to follow; Fig. 2, shows he effect produced by the successive dis placement of the central point of the square at the several points marked in Roman figures in the circle path in Fig. 1; Fig. 3,

shows the effect of the movement of four adjaeent screen apertures; Fig. i, shows the rotatably mounted part of the a )paratus on the side which is turned toward t e source of light; Fig. 5, is a view partly in section on the line A A of Fig. 4; Fig. 6, is a par on the line B B of Fig. 5; Fig. F, section on the line C C of Fig 5; front view of the apparatus f tial section i a partial g. 8 is a which the 5e source of light is caused to 113131}? nular path is shown in Figs. 4

lar path; Fig. 9 is a view party in section on the line 10,1) of Fig. 8; and Fig. 10 is a section on the line it, E of Fig.

Similar letters refer to similar parts throughout the several views.

. Referring to Figs. 1, 2, and 3 it will be seen that by moving the screen in an endless path as shown. by the twelve points in Fig. 1, a dot-is formed as shown in Fig. 2 having the copying intensities as given by the numerals thereon. From these figures there is obtained the form of the decline of the intensity curve, and as regards the shape of the dot it is clear that the corners on the outer sides will disappear by increasing the num-" ber oi the points of displacement; by a con tinuous operation of displacement there is obtained the form shown by dotted lines in Fig. 8 at four adjacent screen points. If the annular path is exactly a circle then round shaped screen points are formed, but if the path is iengthened somewhat then the socalled egg shape, or oval bar shape, is formed.

The preferred form of apparatus for causing the copying lrame and consequently the screen point projection to follow such an an- The invention consists essentially in mounting the frame carryin the copying l'ramc movably in the straight guide of a see end frame which moves in a slide placed at an angle of to the first slide, the arrange-- ment being such that by means of eccentrics, orlcver rods, the two straight movements right angles to each other are changed an annular movement either circular, or elliptical, according to the relative edjustr the niovemenis.

a is the copying frame carrying the screen and the film to be exposed along with the negative,and in its turn the frame a is carried by the frame ed to slide in the slides a of a second semicircular framed in such a way that it can he movedupward and downward. The frame b. This frame I) is mcnne d itself on the contrary is so arranged, by the V aid of slides 2, upon a fixed frame f, that it can be moved sidewise only. The arms 5 attached to theframe ffor the cords leading to the weights h, or it may he chains or the like, are formed at the same time to act as guide forks for the movable frame I). The Weights h, which can also be replaced by springs, are intended to keep the frame f in" equipoise in the sloping or other position requisite for ex osure in order to reheve the eccentric 7c. 1e movement of the two frames 1) and d is effected in this case by means of eccentrics i and 7: which aread ustably connected with the driving shaft 1. The displacement of the eccentrics is effected by the aid of screw spindles m and n winch are mounted in the part '11) firmly attached to the shaft Z. Of these screw spindles, the spindle n has its female thread in a lug 0 mounted on the eccentric i, while the second spindle m engages with the slide p cariymg the eccentric k. The eccentric i must of course be provided with a slot at in order .to accommodate the shaft Zin any position of the eccen trio. As may be seen from Fig. the screw spindle n for the slide 0 passes through a sufficiently wide bpening or hole on the slide p. The slides can also be provided with scales which permit of an exact adjustment of the throw of the eccentrics to give the desired diameters of the ellipsesor circles respectively. The eccentric i engages with-a fork shaped prolongation g of the frame (1 and movesthe latter laterally to and fro on operating the eccentric shaft Z, While the second eccentric 10 moves in a slotted guide '1, which is rigidly connected with the frame I) by means of rods 8. By a suitable adjustment of the eccentrics in relation to each other; and by the operation of the eccentric shaft Z through the cord pulley t, according to the adjustment of the lift of each individual ec- 'centric, a circular or elliptical movement of the whole system is secured.

Any suitable means of driving the apparatus through the spur wheel a may be em ployed and also suitable means for tilting the whole apparatus, 't being explained that it will be carried by trunnions' c in order to allow of this.

instead of moving the co ying frame by the aid of the device descrihed, the device could instead be used for moving the source of light in a similar manner in relation to a fixed copying frame. Figs. 8, 9 and 10 illustrate the apparatus modified in this way, the

parts of the apparatus correspond with the same parts in the movable copying frame, being marked with the same reference letters. The main difference is that the movable element 3) is a solid plate instead of being a frameand a light-in this case an electric arc lamp-is carried thereby and describes an annular path. The plate I) is provided with guide brackets g which keep it in position relative to the fixed plate 7". In this case it will be. obvious that no mechanism is needed directly to a "wall, or other fixed support.

ing blocks, consisting of means for causing the projections of the transparent spaces of a crossscreen upon the sensitive layer of the block to follow a closed annular-shaped path, and means for limiting the maximum diameter of said path to that of one side of the pro-- jected transparent space, substantially as and for the purpose set forth.

3. In apparatus for making auto type printing blocks from half tone negatives or positives by means of a'cross'screen, a first frame carrying the copying frame including the cross screen, a fixed frame supporting the same so that it will move in any direction in one plane, a second frame mounted on the fixed frame so as to move sidewisethereon and connected to the first frame so as to move the latter sidewise with itself while allowingof the independent up and down motion of the first frame, means for moving the first frame up and down, and means for moving the second framcsidcwise, all substantially as and for the purpose set forth.

4. In apparatus for making auto type printing blocks from half tone negatives or positives by means of cross screens a first frame carrying the copying frame including the cross screen, a fixed frame supportingsame so that it will move in any direction in one plane, a second frame mounted on the fixed frame so as to move sidcwise thereon and connected to the first frame so as to move the latter sidcwise with itself while allowing of its independent up and down motion, a slotted cross bar firmly attached to the first frame,

an eccentric pin moving in the said slot and attached to the driving shaft, a fork attached to the sccond'frame, and an eccentric rotating in the said fork and attached to the driving shaft, substantiallj. as dcscribed lICI lH. 5. In apparatus for nail-dug auto type printing blocks from half lone negatives or positives by means of a cross screen, a first frame carrying the copying frame, a fixed frame supporting same by means of projecting guide pieces, a second frame having projcctiug lugs sliding in horizontal slides on the fixed frame, fixed up and down slides on this second frame cooperating with movable up and down slides on the first frame, a slotted cross bar firmly attached to the first frame, an eccentric in moving in the said slot and attached to t e driving shaft, a fork attached whole apparatus in equipoise on its trun-. nion's, substantially as described herein.

6. The eccentric 7; for operating the first frame, having the slide 1) connected with the :3 part w of the driving shalt Z by means of the adjusting screw m, substantially as shown for the purpose specified.

7. The eccentric 'i for operating the second fra1ne,'having the lug 0 connected with the part w of the driving shaft Z by means of the re adjusting screw m, substantially as shown "for the purpose specified.

- In testimony whereof I aHiX my signature in presence of two Witnesses. Q EUGEN ALBERT. i Witnesses: 1 LOUIS F. MUELLER, ALMA MAAsl 1 l l l l l 

